Table Saw spacer to prevent wood from binding between saw blade and fence. When cutting wood, sometimes the wood can bind between the fence and the blade. One way to resolve this is to clamp a piece of wood to the fence so that the wood doesn't ride directly against the fence but against the piece of wood clamped in place. This device attaches to the fence so you don't have to keep looking around for a thin piece of wood every time you start a new project. Pictures show it attached to the fence, it also shows a grove in the bottom that corresponds to two screw heads at the end of my fence that can help keep the device in place while wood is running through.